DeWitt B Brace invented the spectrophotometer Archive

Light as we know existed as long back in time as we can comprehend. Our perception about light however has changed over the years. In the 19th century, all the scientists believed that for anything to propagate there must exist a medium. So to understand the concept of propagation of light, a hypothesis, that there exists infinite ether in the universe through which the light propagated, was accepted globally until the concept of electromagnetic waves came along. Prior to Newton, Christiaan Huygens had hypothesized that light was a wave that propagated through ether, but Newton rejected this idea. This was